Hi, On 09/20/2016 07:39 AM, Emmanuel Grumbach wrote: > On Mon, Sep 19, 2016 at 5:00 PM, Volker Mische <volker.mische@xxxxxxxxx> wrote: >> I'm having connectivity issues with an Intel 8260 on a 2.5GHz network >> when using 40Mhz. I'm getting errors like >> >> Queue 2 stuck for 10000 ms. >> >> I've upgrade my system to the firmware version 21 (21.373438.0) and >> Kernel 4.8.0-rc6 in hope that it fixes the issue and to be able to debug >> the problem. >> >> I then found the page about platform noise [1]. I don't have any issue >> for several hours now (normally I was hitting the issue every few >> minutes) as I've set the cfg80211_disable_40mhz_24ghz parameter. >> >> Now I wonder, is it worth debugging the issue with being on 40MHz or is >> disabling the proper solution and I should bother. > > Well... depends whom you ask and how much time you have :) I really want to get this sorted out. > We tried a few times to debug those, but they take a very long time to debug > since typically we need lots of reproductions and the firmware team > doesn't always > the time to look at the data immediately so in the end, the people who > reported this > originally went away. > Note that 40MHz on 2.4GHz is not an optimal configuration in crowded > environment, > but if you live in a place where you are pretty much the only one using those > frequencies, then, it can be beneficial. It's at home. I normally see only one other wifi (I need to check which frequency that one is using). > What you can try is to disable low power states (by using power_scheme > in iwlmvm) and see if it helps. I will try that. > This setting has a bigger impact than cfg80211_disable_40mhz_24ghz > but it can give a hint as where the problem is coming from. I'll report back. Should I open a bug report (or use an existing one) or should we keep the discussion on the mailing list? Cheers, Volker >> [1]: >> https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi#about_platform_noise
